Furnace.



No. 746,310. PATENTED DC. 8,1903.

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FURNAGE. APPLICATION FILEDJAN. 21. '1903. no MODEL. a sHBnTs-sHnzT 1.

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No I 746,310. PATENTED DEC. 8, 17903.

` T. V. ELLIOTT.

PURNAGE.

APPLICATION FILED JAN. 21 190s.

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FURNAUE. APPLIUATIONPILBDJAN. 21, 1903.

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Patented December e, 1903.v

PATENT OFFICE.

THADIOUS ELLIOTT, OF BROOKLYN,NEW YORK.

FueNA-CE.

SPECIFICATION forming part of Letters Patent No.` 746,310, datedDecember 8, 1903. i x i Application filed 1T anuary 2l, 1903. Serial No.13 9,940. (No model.) l

To all whom it mayconcern:v

Be it known that. LYTHADIOUS V. ELLIOTT, a'citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, havemade certain new and useful Improvements in Furnaces, of which thefollowing is a specification.

My invention is an improvement in furnaces, particularly smoke and gasconsilming furnaces, and especially in that class 'of such furnacesiuwhich oil, air, and steam are utilized in securing a consumption ofthe gases and other products of combustion; and

'lhe present invention relates to means for seconstruction from thatshown in Figs. l, 2,

and 3. Fig. 6 is a detail cross-sectional view on about line 6 6 of Fig.4. Fig. 7'is a crosssectional View on about line7 7 of Fig. 4; and Fig.5 shows a modified form of air-Hue, as will be hereinafter described. -Y

In the construction shown in Figs. 1, 2, and 3 the grate-'bar'surface iscomposed of a series of hollow sections A and A2, which are similar, areopen at the bottom, have their tops a perforated at a', and their sidesa2 fitted closely together, as shown in Fig. Vl. These sections A' andAzar@ arranged, respectively, at the front and rear of the bottom of thefurnace, the front sections A resting at their front ends on ledges B',projecting from the rear side of the front tube B, at the lower edgethereof, as shown in Figs. 1 and 2, and at their rear ends on ledges C',projecting from the front side of the intermediate cross-tube C, at thelower edge thereof,

as shown in Figs. l'and 2. The rear tubes A2 rest at their front ends ona ledge C2 at the rear side of the intermediate tube C and at their rearends on a ledge D at the front side of a rear cross-tube D,so'thetubular grate-bar sections -YA' and `A2 are supported on ledgesprojecting'frcm the tubes between which they extend and rest closetogether 'and form Avwith the said front and intermediate tubes the bedorgrate-bar surface of the furnace.k

The intermediate tube C has its upper side.

perforated at C3 at close intervals for the free `discharge of thegases, the., supplied thereto 'in the after. f .-1

manner more fullyA described herein-v The front grate-bar sections A areeach in alinement with a corresponding one of the rear grate-barsections A2, andcirculatingpipes E extend from a cross-pipe F,varran'gedwithin the intermediate cross-tube C, both to the front and rear withinltheir respective grate-bar sections A and A?, and areiperforatedthroughout their lengths to dischargelings, to which discharge thereturn-pipes G' forconveying the gases back to the grate-bar from thecollector H, as will be more fully described hereinafter. One couplingF2 also receives the discharge of the pipe I for delivering oil andsteam to the cross-pipe F, suchpipe I being coiled at I at the back ofthe furnace and having a connection I2 valved at I8 and leading from theoil-tankl4 and receiving the discharge from the steam-pipe. J,

which is valved atJ', as shown in Fig. 1.

In thefront'of the return-feed boilerA and just above the fines thereof,as shown in Fig. l, I provide the collectorH for the gases and the likedischarged by the said Iiues, the collector being in the form of a boxor receptacle perforated at intervals to receive the products dischargedfrom the flues and connected at its opposite ends at H' with thev upperends of the return-pipes K, which connect at K with the return-pipes Gandreceive the steam-injectors L, whose pipes L are valved at L2 andwhich discharge downwardly in the return-pipes in such manner as toinduce a suction through the collector H and a circulation thence downthe pipes Gr to discharge to the opposite ends of the cross-pipe F, aswill be understood from Figs. l and 3.

In operation the unconsumed gases will be collected in the collector H,discharged then ce to the return-pipe, and be delivered at F2 to thecross-tube C and at F' and the front tube B, as will be understood fromFigs. l and 2 of the drawings. At the same time oil and steam will bedelivered to the cross-pipe F by the pipe I and be suitably controlledby the valve devices, as described and shown in the drawings.

In Figs. 4, 5, 6, and 7 I show a somewhat different construction,wherein the oil and steam are delivered by pipes M, having nozzles M'and discharging within perforated flues N, extending along the oppositesides of the furnace, the return-gases discharging from upright pipes Oto the front cross-pipe P, which delivers to discharge-pipes Q, asillustrated in dotted lines in Fig. 4.

In the construction shown in Fig. 4 the airues N open at the front ofthe furnace, while in Fig. 7 they open at N below the grate-bars. Inboth these constructions the side dues N lie in the side walls of thefurnace, the oil-pipes extending into the airpipes and having nozzles inregister with the openings in the air-pipe in order to send a mixture ofair and oil-vapor directly into the tire over the grate. Manifestly theair-pipes may be round, as shown in Fig. 6, or square, as shown in Fig.5. The construction shown in Figs. 4 and 7, like that shown in Figs. l,2, and 3, includes air-pipes extending longitudinally ot' the furnaceand having perforations, together with oilvapor pipes, extendinglongitudinally Within the air-pipes and discharging at intervalsthroughout their lengths to the said pipes.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. A furnace haviugits grate-surface composed of front and rear seriesof hollow tubular sections tting side by side, and having their uppersides perforated, front and rear cross tubular sections havingprojecting ledges supporting the front ends of the front series and therear ends of the rear series of sections, the intermediate cross-tubehaving its upper side perforated and provided with projecting ledges forsupporting the adjacent ends of the pipes of the sections of the frontand rear series, the cross-pipe extending within said intermediateperforated tube, the perforated discharge-pipes extending from saidcross-pipe to the front and rear within the hollow sections of the gratesurface, the smoke-return pipe discharging to said crosspipe, and theoil-vapor pipe also discharging to the said cross-pipe, substantially asand for the purpose set forth.

2. In a furnace, the grate-surface having a series oflongitudinally-disposed perforated flues or sections combined withcross-dues communicating with said perforated fines and with means forsu pplying the returned smoke to one of said cross-fines and oil-vaporto the other one of said cross-dues, substantially as set forth.

3. A furnace having a grate-surface consisting of a series of perforatedlongitudinal air-fines, and a pair of cross-dues communieating with saidlongitudinal flues combined with a smoke-return pipe having branchesdischarging to said cross-flues substantially as set forth.

4. The combination in a furnace of the intermediate and end cross-dueshaving projecting ledges, and the hollow perforated grate-sectionssupported at their ends on said ledges,thecrosspipeextendinglongitudinally within the intermediate Hue-section, thedischarge-pipes leading from said crosspipe Within the hollow section,and means for delivering oil-Vapor to said cross-pipe, substantially asset forth.

5. The combination in a furnace, of the 4grate-surface having anintermediate crossue, and a cross pipe extending therein, means forsupplying oil-vapor to said crosspipe, the smoke-collector, return-pipesleading fromsaid collector to the cross-pipe, and injector devicesoperating within the returnpipes, substantially as set forth.

6. The combination in a furnace of the grate-surface having front andintermediate cross-fines, and hollow perforated fines extending betweenthe same, a cross-pipe extending within the intermediate cross-flue, a

smoke-collector, and return-pipes in connec tion with said collector anddischarging to the front and intermediate cross-fines, substantially asset forth.

THADIOUS V. ELLIOTT.

Witnesses:

THEO. G. Hos'rER, EVERARD BoLfroN MARSHALL.

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